Inspection And Verification

WARNING: This page is about a different car, the 2004 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Verify the customer's concern by operating the climate control system to duplicate the condition.

Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART

Mechanical	Electrical
Loose, missing or damaged A/C compressor drive belt Loose or disconnected A/C clutch Broken or binding door/actuator Broken or leaking refrigerant lines Obstructed in-vehicle temperature sensor Disconnected in-vehicle temperature aspirator hose	Open fuses Blower motor inoperative A/C compressor inoperative Circuitry open/shorted Disconnected electrical connectors Cooling fan inoperative

As pinpoint tests and measurements are being carried out, be sure to inspect for any disconnected, loose-fitting, or incorrectly installed component, module and in-line electrical connectors and pins.
If the inspection reveals obvious concern(s) that can be readily identified, repair as required.
If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the vehicle selection cannot be entered:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
If the scan tool still does not allow the vehicle selection to be entered, refer to the scan tool manual.
Carry out the DATA LINK DIAGNOSTIC TEST using the scan tool. If the scan tool responds with:
- SCP+, SCP- or UBP circuits fault = ALL MODULE NO RESPONSE/NOT EQUIPPED, go to Communication System Diagnostics in MODULE COMMUNICATIONS NETWORK to diagnose the network concern.
- If the powertrain control module (PCM) is not listed for a communication concern, turn the A/C controls to OFF and execute the self-test diagnostics for the PCM.
- If the DATC module is not listed for a communication concern, execute the self-test diagnostics for the DATC module.
If any PCM or DATC DTCs are retrieved, and are related to the concern, go to the POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX or the DUAL AUTOMATIC TEMPERATURE CONTROL (DATC) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX to continue the diagnostics.
If no DTCs related to the concern are retrieved, go to the SYMPTOM CHART to continue the diagnostics.
If the Dual Automatic Temperature Control module cannot be accessed by the scan tool, Go To PINPOINT TEST H: NO COMMUNICATION WITH THE DUAL AUTOMATIC TEMPERATURE CONTROL MODULE .